Vulcanizing-fuse.



L. RISK.

VULCANIZING FUSE. APPLICATION msn SEPT. 25,1916.

1,209,206. Patented 1106.111916 LLL w/ T/veww vnf/vra@ Unirse sTA'rEsmirar@ OFFICE.

Loman` msn, orinmnnaroms, MINNESOTA.

ViULcaNIzING-Fnsn.

Specification of Letters Patent.

atenten Dee. 1o, 1916.

Application filed September 25, 1916. Serial No. 121,921.

adapted for use in viilcanizing patches' onv pneumatic, tires, but. adapfor more general use.

The fuse, as preferably constructed,-com- .prises a thin sheet metal panand a combustible elenlient therein, the latter being made ii-p of amultiplicity of layers or pieces of fiber or straw board coated and moreor less saturated with combustible material. This combustible materialis preferably a mixture of potassium nitrate4 (saltpeter) and pulverizedcharcoal in warm water, the fiber board layers being dipped and soakedin this liquid and then dried.

As an important feature of this invention, either all or part of theboard sheets are perforated, but iii ,the preferred arrangement whereinabout three sheets of the board are employed, all but the lower areperforated, and. the lower or bottom sheet or board is ed, neverthelessiniperforate, lint nevertheless, coated or saturated witlrthecombustible material. l

The, preferred form of the improved fuse is illustrated in theaceon'ipanyiiig drawings: wherein like characters indicate like partsthroughout the several views.

Referring' lo the drawings, Figure 1 is a plan view of the improvedfuse; Fig. 2 is a 'sidoelevation iliereof,`with some parts scctioned;Fig. B is a side elevation showing the sheets or boards that makeup thecombustible element; Fig'. 4 is a plan View of one of the perforatedsheets; and Fig.4 5 is a plan view of the imperforate bottom' board orsheet.

The sheet metal the numeral 6.

The perforated boards orsheets ofthe combustible element are indicatedby the numeral 7 while the imperforate bottom board or sheet (hereof isindicated by the numeral 8. These boards or sheets 7 such size and shapethat they fit the rim of fuse pan is indicated by and 8 are of` thepan,and when pressed into the pan will` be friet-ionally held in place.

'llie viileanizing fuse of the general veharactor herein disclosed, yandwherein imperfoi'ate fuse sheets 'or plates have .not been employed,burnv-ery slowly and have a tendency to collect moisture which makes theburning thereof not only slowr but uneven.

plates not only The perforate fuse sheets or exposed to the air durgi'vegreater surface ing combustion, and

mit the more intimate association of the pulverized carbon andsaltpeter, which, in itself, insures more complete Y and quickercombustion, and'furthermore, these per foi-ations prevent thecombustible element from becoming moisture good combustion, evenmoisture 'is present.

lf all of the boards or sheets of the combustible material shouldbeperforated, the combustion might in some cases be alittle too rapid,and hence, preferably the bottom sheet or plate is imprforate.. In thisarrangement, the combustion will tense, rapid and complete over whereconsiderable ot the combustion will be. delayed and prolong-ed b v theiinpei'forate bottom sheet or board.

The. eilioiency of the vulcanizing fuse above described, has beenthoroughly demiiiistrated in practice, and inthe use thereof, has beenfound that not only will the-combiislion be complete and intense, :butthat it will be ofthe pan (l. lt is, of course, understood that in theoperation of vulcanizing a patch on (he inner tube ofn tire, forexample, the bottoni of the pan will be clamped against the viilcanizing:itch while the latteitds properly applied on the tool.

What I claim is:

1. viilcanizing fuse comprising a com. bustible element made up of amultiplicity of perforated combiist-iblesheets or boards, certain of'which are perforated, and of which are imperforate.

2. A iv'ulcanizinf,r fuse comprising a c0mbustible clement made up of amultiplicity of combustible sheets or boards held tohence, makecombustion more or less rapid to complete, but may persoaked and insuresY even lover the entire bottom surfacel c ertain be very inthe entireupper part of the fuse, but the completionA gether, the bottom boardbeing imperforate r' porfomtod combustible sheets or boards, n moful puncontaining said combustible lf l0' ovl-mm of which are perforated, andcertain ment.

of which :1ro imperforzlbe, and a metal pan ln testimony wlmi-ooi' lnllx my sgnnhm. vontnining snll combustible element. in prosvm-z ol" twominos-SUS.

Jr. vulvanizing fuse comprisingr a coml ,T (Winx plqK lmstiblo allumentmade up 0i' u multiplicity J' of comlmstiblo. sheets o1' boards held.t0- nmwwz gotlwl'. tlw bottom board being imporfomtc (`L,\|:.\ lll-1nunisi'. U und Llle upper boards boing perform@ nml Humm; (i.l\.\`m|-1i.1:1:.

